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Henseleit 3DNT - Rocket - 3DMP > 3dnt going in fail safe during flight
 
 
helifever
Senior Heliman
Location: BE-8750

As i have experienced this a few times with 2002 and 2003 version resulting in a crash, and i've heard some collegues had the same thing, i would like to know if others have had this also.

I would apreciate it very much if you could write down your experiences and if you have or haven’t solved the problem. I know many don’t have this problem so “i don’t have this problem” doesn’t help us very much in this case.

My opinion is that there are 2 possible causes :

1) antenne : especially nose in and a little nick front, or inverted nose in nick front,
or during a stallt turn heck don’t respond immediately
a possible solution i’ve seen in germany is to link the antenna with the vertical carbon heck part and not to use the plastic tube on the skids

2) glitching from heck belt, that there was a problem in earlier versions is very clear as Mr henseleit invented the grafit rolls to unload the belt continuously
but i don’t think this is enough, saying 100% safe, during inverted flight or especially backwerts inverted flight the belt is covered in oil and also the grafit rolls, at this point they are of no use

i’ve seen a solution to this where a german pilot uses a mass wire that puches against the heckbelt and unloads it even when it is covered with oil


helifever
08-18-2003 Over year old.
HOMEPAGE  
 
 
nocontrol
Veteran
Location: Cape Town, South Africa

On the Vigor CS there is a copper plate between the 2 frames. You have to take the clear coat off the frames first. This is to help for your kind of problem. Maybe you must scrape the side frames a bit where metal touches it for conductivity???

As we are still building the first one (2003 model) in South Africa, Cape Town this is a very interesting point.
08-18-2003 Over year old.
HOMEPAGE  
 
 
Pascal
Senior Heliman
Location: Paris, France

Hi,


I never had any radio problem with my 3DNT, and I am using the carbon (black) canopy.

Have you checked that you have electric continuity from the engine to the little ballbearing above the A/C belt ? if not this will surley cause interference problems.

Pascal
08-18-2003 Over year old.
 
 
mbcopter
Heliman
Location: belgium (aalst)

fail safe

Hi,

I had once a failsafe.
That's when i made a bad auto and the landinggear came lose.
I didn't checked this and when i flyed again, i had a failsafe!
So the landingskidplates touched the carbonframe.
After fixing, i had no more troubles.
Maybe this can help.....
regards
Marc Baillius
Belgium
08-18-2003 Over year old.
 
 
helifever
Senior Heliman
Location: BE-8750

pascal,

i've had a look at your gallery and it seems like you have the black fiber canopy with no carbon in it (black gelcoat carbon look), the real carbon canopy for the nt looks like this :



helifever
08-18-2003 Over year old.
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Carps
Veteran
Location: Caterham, Surrey, England

As posted on another thread, I run carbon canopies on both my NTs, and have not had any lockouts. I run JR Z-PCM.
As I mentioned in the other thread, I used to have a problem (when I still had the original canopy fitted) and I tracked it down to the fact that I had the antenae (in fuel tubing) tied tight to the carbon frames before it doubled back and entered the aerial tube. Now I have this totally loose, and have no problems. In order to prove this I took the heli to a field and range checked with the aerial tied, and then with it loose. My range was over triple with it loose.

BTW, I think that must be an old picture of Pascals 3DNT - I am sure he has the carbon canopy
08-18-2003 Over year old.
HOMEPAGE  
 
 
helifever
Senior Heliman
Location: BE-8750

saturday i spook with a dutch 3DNT pilot who flies ppm, he confirmed he also has regularly "ticks" during flight.

anyone else experiencing this?

helifever
08-25-2003 Over year old.
HOMEPAGE  
 
 
nocontrol
Veteran
Location: Cape Town, South Africa

PPM and heli’s do not go together. Yes there are some with success using PPM but the majority use SPCM. At our club we had 2 people with PPM and a lot of glitches and crashes, both changed to SPCM and it works fine ever since. Just do not tell the fixed wing pilots this or to use synthetic oil – they disagree furiously.

On the antenna: I do not like to “coil” the antenna. As per manual you go forward with antenna and then back again. Measure from complete front to complete back of antenna – short distance hey. What we did is to use fuel tube from receiver to left boom support, passing in front of canopy stand off, and then more flexible tube than white peace in kit running on the left boom support to plastic bracket on boom and then to tail fin (bottom of top hole) and ¾ down tail fin. Now measure the distance as before, almost double. I run it the same way on my CS, on carbon frame and boom support with no problem. (I saw that Jason Krause does it this way) On 3DNT my range is same as on my CS.

Take a normal radio pull the aerial out and bend it half way back. Your reception will not be as good as with a fully extended straight aerial. Just my way of thinking.
09-02-2003 Over year old.
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Henseleit 3DNT - Rocket - 3DMP > 3dnt going in fail safe during flight
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